TOC invokes node_view twice when creating a TOC block

TOC invokes the node_view twice when the TOC block is enabled. I found this out as I had a module of my own which added javascript settings twice in the hook_nodeapi ($op = 'view') function. This messed up the functioning of my module. Also, I believe invoking the node_view function twice reduces performance.

In tableofcontents_block.module the following function is to blame for the invoking of node_view a second time:

<?php
function _tableofcontents_block_view() {
  global $_tableofcontents_block_processing;
  global $_tableofcontents_block_toc;

  // verify access permission
  // then whether we are viewing a node
  if (!user_access('access content')
      || arg(0) != 'node' || !is_numeric(arg(1))) {
    // no block
    return;
  }
  $node = node_load(arg(1));

  $_tableofcontents_block_processing = TRUE;
  
  $text = node_view($node, FALSE, TRUE, FALSE);
  unset($_tableofcontents_block_processing);

  module_load_include('pages.inc', 'tableofcontents');
  $_tableofcontents_block_toc = '[toc]';
  $text = _tableofcontents_process(0, 'block', $text);
  unset($_tableofcontents_block_toc);

  if ($text) {
    $block['content'] = $text;
    $block['subject'] = t('Table of contents');
    $block['weight'] = 0;
    return $block;
  }
	
  // no block
}

?>

May I draw your attention to this part here:

<?php
  $text = node_view($node, FALSE, TRUE, FALSE);
?>

Which I have changed to this, so far without ill effect:

<?php
  $text = $node->body;
?>

Is there a special reason why node_view() is invoked? $node->body served me just as well. Is it a filtering issue?

If anyone was having trouble with javascript settings and Table Of Contents, this is probably the issue.